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<p>This study presents a systematic comparison of nanoclay (NC), halloysite nanotubes (HNTs), graphene oxide (GO), and carbon nanotubes (CNTs) as reinforcing nanofillers in chloroprene rubber/natural rubber (CR/NR) blends. The composites were prepared using a two-roll mill, and their curing behavior, mechanical properties, abrasion resistance, compression set, and swelling characteristics were comprehensively evaluated. Rheometric analysis showed that the incorporation of nanofillers accelerated vulcanization and increased torque values, indicating enhanced crosslink density. Mechanical properties, including tensile strength and stress at 100% elongation, increased with nanofiller loading up to an optimum level of 6 phr, beyond which performance declined due to filler agglomeration. In contrast, elongation at break and rebound resilience decreased with increasing filler content, reflecting restricted chain mobility, whereas hardness, tear strength, and compression set exhibited progressive increases. Among the nanofillers investigated, CNTs provided the most effective reinforcement, yielding improvements of approximately 60% in tensile strength, 62% in tear strength, and 52% in stress at 100% elongation compared to the unfilled blend.</p>

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Comparative study on the effect of nanoclay (NC), halloysite nanotubes (HNTs), graphene oxide (GO), and carbon nanotubes (CNTs) on the mechanical properties of chloroprene rubber/natural rubber (CR/NR) blends

  • 期刊论文

  • 发表日期：

    2026年3月2日

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  • K. Parthasarathy,
  • S. Baskar,
  • S. Vishvanathperumal

摘要

This study presents a systematic comparison of nanoclay (NC), halloysite nanotubes (HNTs), graphene oxide (GO), and carbon nanotubes (CNTs) as reinforcing nanofillers in chloroprene rubber/natural rubber (CR/NR) blends. The composites were prepared using a two-roll mill, and their curing behavior, mechanical properties, abrasion resistance, compression set, and swelling characteristics were comprehensively evaluated. Rheometric analysis showed that the incorporation of nanofillers accelerated vulcanization and increased torque values, indicating enhanced crosslink density. Mechanical properties, including tensile strength and stress at 100% elongation, increased with nanofiller loading up to an optimum level of 6 phr, beyond which performance declined due to filler agglomeration. In contrast, elongation at break and rebound resilience decreased with increasing filler content, reflecting restricted chain mobility, whereas hardness, tear strength, and compression set exhibited progressive increases. Among the nanofillers investigated, CNTs provided the most effective reinforcement, yielding improvements of approximately 60% in tensile strength, 62% in tear strength, and 52% in stress at 100% elongation compared to the unfilled blend.